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| author | Ken Chen <kenchen@google.com> | 2008-12-15 22:04:15 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-12-16 12:15:01 +0100 |
| commit | e9515c3c9feecd74174c2998add0db51e02abb8d (patch) | |
| tree | 961e5fc9f0d01a901fd28c548b8f39037611a4ce /kernel | |
| parent | 720f54988e17b33f3f477010b3a68ee872d20d5a (diff) | |
| download | lwn-e9515c3c9feecd74174c2998add0db51e02abb8d.tar.gz lwn-e9515c3c9feecd74174c2998add0db51e02abb8d.zip | |
sched, cpuacct: export percpu cpuacct cgroup stats
This patch export per-cpu CPU cycle usage for a given cpuacct cgroup.
There is a need for a user space monitor daemon to track group CPU
usage on per-cpu base. It is also useful for monitoring CFS load
balancer behavior by tracking per CPU group usage.
Signed-off-by: Ken Chen <kenchen@google.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 41b7e2d524d6..f53e2b8ef521 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -9342,12 +9342,32 @@ out: return err; } +static int cpuacct_percpu_seq_read(struct cgroup *cgroup, struct cftype *cft, + struct seq_file *m) +{ + struct cpuacct *ca = cgroup_ca(cgroup); + u64 percpu; + int i; + + for_each_present_cpu(i) { + percpu = cpuacct_cpuusage_read(ca, i); + seq_printf(m, "%llu ", (unsigned long long) percpu); + } + seq_printf(m, "\n"); + return 0; +} + static struct cftype files[] = { { .name = "usage", .read_u64 = cpuusage_read, .write_u64 = cpuusage_write, }, + { + .name = "usage_percpu", + .read_seq_string = cpuacct_percpu_seq_read, + }, + }; static int cpuacct_populate(struct cgroup_subsys *ss, struct cgroup *cgrp) |